The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 1990
Filed:
Aug. 18, 1988
Applicant:
Inventors:
Hiroshi Omata, Kawasaki, JP;
Shigeharu Iijima, Kawasaki, JP;
Eizou Sasamori, Yokohama, JP;
Katsuhiko Takano, Yokohama, JP;
Eiichi Fujii, Yokohama, JP;
Ichiro Saito, Kawasaki, JP;
Yoichi Osato, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428215 ; 428336 ; 428694 ; 428698 ; 428900 ;
Abstract
There is disclosed an optical recording medium provided with an optical recording layer on a substrate, in which a layer of nitride of a substance selected from tungsten, zirconium, titanium, niobium, vanadium, tantalum and chromium is formed on a side or both sides of the optical recording layer.